3815641

Information

• Patent Grant
• 3815641

• References
• Source

• Patent Number

  3,815,641

• Date Filed

  Not available

• Date Issued

  Tuesday, June 11, 1974
  50 years ago

• CPC

  • F16L21/03 - placed in the socket before connection
  • F16L9/08 - of concrete, cement, or asbestos cement, with or without reinforcement
  • F16L21/025 - Rolling sealing rings
  • F16L25/0027 - Joints for pipes made of reinforced concrete
  • F16L43/007 - made of concrete, cement or asbestos-cement

• US Classifications

  • 138 - Pipes and tubular conduits
  • 285 - Pipe joints or couplings